Swivel hook



C. V. KOONS May 19, 1931.

SWIVEL HOOK Filed April 16, 1930 Patented May 19, 1931 UNITED STATESPATENT FFicE CHABLES VERNON KOONS, F PHILADELPHIA, PENNSYLVANIA;ASSIGNOR T0 AMER-I- CAN ENGINEERING COMPANY, 033 PHILADELPHIA,PENNSYLVANIA, A COEPORA- TION OF PENNSYLVANIA SWIVEL HOOK Applicationfiled April 16,

This invention relates to improvements in swivel hooks, and theprincipal object of the invention is to provide a novel swivel hookassemblage having improved characteristics as regards structuralsimplicity and the replacement of the various major elements.

In the attached drawings:

Figure 1 is a vertical sectional view of a swivel hook assemblage madein accordance with my invention;

gig. 2 is a section 011 the line 2-2, Fig. 1, an

Fig. 3 is a section on the line 3-3, Fig. 1.

Referring to the drawings, the assemblage forming the subject-matter ofthe present invention comprises in a preferred embodiment a two-parthousing consisting of an upper element 1 and a lower element 2. At theirmeeting edges, the elements 1 and 2 are pro- 29 vided with transverselyprojecting segmental flanges 3, 3 and 4:, 4 respectively, these flangesbeing so relatively positioned and arranged as to permit insertion ofthe flanges of one of the elements between the flanges of the otherelement and an interlocking of the flanges by a subsequent partialrotation, approximately 90, of the one element with respect to theother. Following assembly of the elements 1 and 2 as described, theseparts may be held in the interlocked relation by means of a set screw 5,see Fig. 1.

As illustrated, the element 2 is provided in the interior with a centralrecess 6, in the bottomof which is a coaxial opening 7 extending throughthe wall of the said element. Around the inner end of the aperture 7,the bottom of the recess, 6 forms a seat for an anti-friction bearing 8,and in assemblage the cylindrical threaded stem 9 of a hook 10 extendsupwardly through the opening 7 and through the bearing 8 and is securedin the element 2 by means of a nut 11, which seats upon the bearing 8,as clearly illustrated. The nut and the stem 9 are both perforated forreception of a split or cotter pin 12. The arrangement provides for freeswivelling of the hook 10 in the element 2.

The element 1 has in the top a slotted opening 13 for passage of the endof a sup- 1930. Serial No. 44%,855.

porting cableletto the looped end of which isattached a clamping member15, [he clamp 15 comprises opposed elements 16, 16, each having in itsinner face a channel for reception of the cable 14 and an opening for abolt 17, by means of which the elements 16, 16, may be clamped firmly onthe cable. \Vhen so clamped, the upper slightly tapered end of the clamp15 fits within the correspondingly tapered slotted opening 13, see Fig.2, in wedge fashion whereby the cable 14; is anchored. within theelement 1. The arrangement is such that tension on the cable 14 tendingto withdraw it from the element 1 creates a correspondingly strongclamping action of the elements 16, 16, against the cable.

The swivel hook assembly as described above is characterized not only byextreme simplicity of construction but also by the simplicity with whichthe various elements maybe detached for replacement purposes. Separationof the elements 1 and 2 may be accomplished by releasing the set screw 5and a subsequent relative rotation of the saidelements to disengage theinterlocking flanges 3 and 4E. Thereafter, the element 1 may beseparated from the cable by merely releasing the bolt 17 and removingthe clamp 15, while the book 10 and bearing 8 may be removed by releaseof the nut 11 from the stem 9.

I claim:

1. In a swivel hook, a housing comprising separable sections, and meansfor detachably Securing said sections together, said housing having anaperture at the top for reception of a cable and another aperture at thebottom, a hook swiveled in the bottom aperture, and means locatedentirely within the housing for preventing retraction from the latterboth of the cable and the hook, said means being detachable to permitsaid re traction and being accessible for detachment by separation ofthe housing sections.

2. In a swivel hook, a housing comprising upper and lower separablesections, and means for detachably securing said sections together,means for attaching the upper section to a supporting cable, the saidlower section being apertured, a hook having a stem loosely fitted insaid aperture; and means detachab'ly connected to said stem in theinterior of the housing'for preventing retraction, said hook being freeto rotate in the 5 housing about the aims of said stern.

3. In a swivel hook, a housing -comprisi'ng upper and lower separablesections,' and means for detachably securing said sections together,means, for, connecting the upper section to a supporting cable, thelower-section being apertured, a hook 'havingasteni inserted insaidaperture, and means attached 7 to the stem in the interior of saidhousing for preventing retraction of the, stem from the latter, theinner end of saidaperture-termh n'ating "in seat, and an anti-frictionbeari'ng interposed betweensaid seat and the hook-retaining" means andproviding for a free rotational Inove'inent of the hook With go respeepwthe housing aboutth-e axisofgsaid stern. v 4.. In a'swivel'hook, ahousing comprising upp'en'and lower separable sections, and means fordetachably'securing said sections together, means for securing theupper-section "to a supporting cable, said lower sectiofn being recessedin the interior of the housing and having an aperture; extending frombottom of said recess to theexterior at of the housing, a hook hatingajstein adapted for" insertion "in said'aperture, and ineans detachablysecured to the inner end of said steni for preventing retraction of'th'ehook from the housing, andan al'i ti-friction bear- 3'5 i'ng seated inthe, bottom ofsaid recess and engaged by thehook-retaining means Where:by the hook is afi'ordeid a free rotational movement with respect to thehousing about the axis of said stein.

40' CHARLESYVVERNON KOONS.

